alkali

Từ điển Oxford Learners Wordfinder Dictionary

noun

1. any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water (Freq. 3)
- bases include oxides and hydroxides of metals and ammonia
• Syn:
base
• Derivationally related forms:
alkalize, alkalify, base (for: base), basify (for: base)
• Hypernyms:
compound, chemical compound
• Hyponyms:
pyridine, purine, imidazole, iminazole, glyoxaline,
melamine, cyanuramide, pyrimidine
2. a mixture of soluble salts found in arid soils and some bodies of water;
detrimental to agriculture
• Derivationally related forms:
alkalic, alkalify
• Hypernyms:
salt